<template>
  <view>
    <my-search @myclick="handleMyclick"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧滚动区域 -->
      <scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i === active ?'active':'']" @click="handleIndex(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <!-- 右侧滚动区域 -->
      <scroll-view class="right-scroll-view" :scroll-top="scrollTop" scroll-y :style="{height: wh + 'px'}">
        <view class="cate-lv2" v-for="(item2,index) in cateLevel2" :key="index">
          <!-- 第二层：标题分类 -->
            <view class="cate-lv2-title">/{{item2.cat_name}}/</view>
            <!-- 第三层商品图分类 -->
            <view class="cate-lv3-list">
                <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3.cat_id)">
                  <!-- 图片 -->
                  <image :src="item3.cat_icon"></image>
                  <!-- 文本 -->
                  <text>{{item3.cat_name}}</text>
                </view>
            </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  // import {$http} from '@escook/request-miniprogram'
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    data() {
      return {
        wh: 0,
        // 分类数据列表
        cateList:[],
        // 当前激活的索引
        active:0,
        //分类数据二级列表
        cateLevel2:[],
        // 距离头部距离
        scrollTop:0
      };
    },
    mixins: [badgeMix],
    onLoad(){
      // 获取当前系统的信息
          const sysInfo = uni.getSystemInfoSync()
            // 为 wh 窗口可用高度动态赋值
          this.wh = sysInfo.windowHeight-50
          this.getCateList()
    },
    methods:{
      // 获取分类数据接口处理函数
      async getCateList(){
        // const {data:res} await wx.request({
        //   url:'https://api-hmugo-web.itheima.net/api/public/v1/categories',
        //   method:"GET",
          
        // })
        const {data:res} =await uni.$http.get('/api/public/v1/categories')
        // console.log(res);
        if(res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        this.cateLevel2 = res.message[0].children
      },
     // 处理点击时tab索引
      handleIndex(index){
        // console.log(index);
        this.active = index
        this.cateLevel2 = this.cateList[index].children
        this.scrollTop = this.scrollTop == 0?1:0
      },
      gotoGoodsList(id){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid='+id
        })
      },
      handleMyclick(){
        console.log('ok');
      },
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;
    .left-scroll-view {
      width: 120px;
      .left-scroll-view-item{
        background-color: #f7f7f7;
        text-align: center;
        line-height: 60px;
        font-size: 12px;
        &.active{
          background-color: #ffffff;
          position: relative;
          &::after{
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
          }
        }
        
      }
    }
    .cate-lv2-title {
      font-size: 12px;
      font-weight: bold;
      text-align: center;
      padding: 15px 0;
      
    }
    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;
    
      .cate-lv3-item {
        width: 33.33%;
        margin-bottom: 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
    
        image {
          width: 60px;
          height: 60px;
        }
    
        text {
          font-size: 12px;
        }
      }
    }
  }

</style>

